A project without lighting?
If using Cycles Render, In Properties Panel, go to Render Layers tab, under Passes, under Diffuse, check Color, then render your scene, When render is done, in Compositor, link the Diffuse Color in the Render results node to the Output node, you'll get the diffuse only.

Edit: My apologies for the mistake, I mentioned earlier that you should check Diffuse Direct, I corrected the answer since Diffuse Color should be checked.